Dorman 603-289 Engine Coolant Reservoir - Front

Overview of Dorman Engine Coolant Reservoir for Toyota Highlander

The Dorman 603-289 engine coolant reservoir is designed specifically for Toyota Highlander models, providing a reliable replacement for your vehicle's cooling system. Made from durable white plastic, this reservoir includes a flip-top cap and necessary tubing to maintain proper coolant levels.

• Constructed from durable white plastic for corrosion resistance
• Includes flip-top cap for easy access and secure sealing
• Comes with tubing for proper coolant flow
• Features two mounting holes for secure installation
• Cap included; mounting hardware and brackets not included
• Non-pressurized design suitable for Toyota Highlander cooling systems

Detailed Product Description

The Dorman 603-289 engine coolant reservoir is engineered to meet the specifications of Toyota Highlander vehicles. Its white plastic construction ensures resistance to heat and corrosion, extending the life of the cooling system component. The reservoir is designed with two mounting holes to align with factory mounting points, although mounting hardware and brackets are not included. The flip-top cap allows for convenient coolant level checks and refills without removing the entire cap assembly. This reservoir is non-pressurized, matching the original equipment design for proper coolant expansion and contraction during engine operation.

Compatible Applications and Common Issues Addressed

• Replacement for cracked or leaking coolant reservoirs in Toyota Highlander models
• Resolves coolant overflow or low coolant level warnings
• Prevents engine overheating caused by coolant loss
• Addresses reservoir cap failure or loss with included flip-top cap
• Restores proper coolant containment and system pressure balance

Installation Notes and Tips

Installation of the Dorman 603-289 engine coolant reservoir requires removal of the old reservoir and proper alignment with the two mounting holes on the vehicle. Since mounting hardware and brackets are not included, reuse existing components or acquire compatible hardware separately. Ensure the flip-top cap is securely closed after filling the reservoir with the recommended coolant type. Check for leaks after installation and during initial engine operation to confirm a proper seal.

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 603-289 engine coolant reservoir undergoes quality inspections to ensure durability and compatibility with Toyota Highlander vehicles. Warranty coverage details can be obtained from Dorman directly or through authorized distributors.